package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetMealDishMapper setMealDishMapper;

    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
//        向菜品表插入一条数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);
        Long id = dish.getId();
//        向口味表插入多个数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (!flavors.isEmpty() && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(id));
            dishFlavorMapper.insertBatch(flavors);
        }


    }

    /*分页查询*/
    @Override
    public PageResult pageQuery(DishPageQueryDTO dto) {
        PageHelper.startPage(dto.getPage(), dto.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dto);
        return new PageResult(page.getTotal(), page.getResult());
    }


    /*批量删除菜品*/
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
//        是否能删除，是否起售中
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus().equals(StatusConstant.ENABLE)) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
//        当前菜品是否被套餐关联

        List<Long> setMealIds = setMealDishMapper.getSetMealIdsByDishIds(ids);
        if (!setMealIds.isEmpty() && setMealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }


//        删除菜品数据
        dishMapper.deletes(ids);
//        菜品口味数据
        dishFlavorMapper.deleteByDishIds(ids);
    }


    /**
     * @param id
     * @return 查询对应的菜品和口味
     */
    @Override
    public DishVO getByIdWithFlavors(Long id) {
        Dish dish = dishMapper.getById(id);
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /*修改菜品的信息*/
    @Override
    @Transactional
    public void update(DishDTO dishDTO) {
//修改菜品表
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
//        删除原有口味
        Long dishDTOId = dishDTO.getId();
        dishFlavorMapper.deleteByDishID(dishDTOId);
//        插入新传入的数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (!flavors.isEmpty() && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishDTOId));
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /*根据分类id查询菜品*/
    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder().categoryId(categoryId).status(StatusConstant.ENABLE).build();

        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     *
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d, dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    /*菜品起售、停售*/
    @Override
    public void changeStatus(Integer status, Long id) {
        Dish dish = Dish.builder().status(status).id(id).build();
        dishMapper.update(dish);
    }
}
